1 files changed, 51 insertions, 0 deletions
diff --git a/browser/base/content/test/tabs/browser_tab_move_to_new_window_reload.js b/browser/base/content/test/tabs/browser_tab_move_to_new_window_reload.js
new file mode 100644
index 0000000000..6af8f440fd
--- /dev/null
+++ b/browser/base/content/test/tabs/browser_tab_move_to_new_window_reload.js
@@ -0,0 +1,51 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { TabStateFlusher } = ChromeUtils.importESModule(
+  "resource:///modules/sessionstore/TabStateFlusher.sys.mjs"
+);
+
+// Move a tab to a new window the reload it.  In Bug 1691135 it would not
+// reload.
+add_task(async function test() {
+  let tab1 = await addTab();
+  let tab2 = await addTab();
+
+  is(gBrowser.multiSelectedTabsCount, 0, "Zero multiselected tabs");
+
+  await BrowserTestUtils.switchTab(gBrowser, tab1);
+  let prevBrowser = tab1.linkedBrowser;
+
+  let delayedStartupPromise = BrowserTestUtils.waitForNewWindow();
+  let newWindow = gBrowser.replaceTabsWithWindow(tab1);
+  await delayedStartupPromise;
+
+  ok(
+    !prevBrowser.frameLoader,
+    "the swapped-from browser's frameloader has been destroyed"
+  );
+
+  let gBrowser2 = newWindow.gBrowser;
+
+  is(gBrowser.visibleTabs.length, 2, "Two tabs now in the old window");
+  is(gBrowser2.visibleTabs.length, 1, "One tabs in the new window");
+
+  tab1 = gBrowser2.visibleTabs[0];
+  ok(tab1, "Got a tab1");
+  await tab1.focus();
+
+  await TabStateFlusher.flush(tab1.linkedBrowser);
+
+  info("Reloading");
+  let tab1Loaded = BrowserTestUtils.browserLoaded(
+    gBrowser2.getBrowserForTab(tab1)
+  );
+
+  gBrowser2.reload();
+  ok(await tab1Loaded, "Tab reloaded");
+
+  await BrowserTestUtils.closeWindow(newWindow);
+  await BrowserTestUtils.removeTab(tab2);
+});